Patents by Inventor Terence E. Attwood

Terence E. Attwood has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Production of tetrafluoroethylene polymers
    Patent number: 4921922
    Abstract: Production of coagulated dispersion grades of PTFE using an aqueous emulsion polymerization process which employs an initiator system comprising disuccinic acid peroxide and ammonium sulphite, the latter being added during the course of the polymerization. The resulting polymer can be fabricated into porous products of improved properties.
    Type: Grant
    Filed: June 2, 1988
    Date of Patent: May 1, 1990
    Assignee: Imperial Chemical Industries PLC
    Inventors: Terence E. Attwood, Richard F. Bridges
  • Production of tetrafluoroethylene polymers
    Patent number: 4766188
    Abstract: Production of coagulated dispersion grades of PTFE using an aqueous emulsion polymerization process which employs an initiator system comprising disuccinic acid peroxide and ammonium sulphite, the latter being added during the course of the polymerization. The resulting polymer can be fabricated into porous products of improved properties.
    Type: Grant
    Filed: November 9, 1987
    Date of Patent: August 23, 1988
    Assignee: Imperial Chemical Industries plc
    Inventors: Terence E. Attwood, Richard F. Bridges
  • Article with antistick coating and composition
    Patent number: 4167605
    Abstract: A coating composition comprises a dispersion of a fluorocarbon polymer in an inert diluent having dissolved, or preferably dispersed, therein a low molecular weight (RV less than 0.25) polyethersulphone or precursor thereto.
    Type: Grant
    Filed: February 6, 1978
    Date of Patent: September 11, 1979
    Assignee: Imperial Chemical Industries Limited
    Inventors: Terence E. Attwood, Ronald P. Buckley
  • Coating process using dispersions of tetrafluoroethylene polymers and polyethersulphones and article
    Patent number: 4131711
    Abstract: Substrates are coated with a composition comprising a low molecular weight polyethersulphone containing hydroxyl and groups and having a reduced viscosity of less than 0.25 (as measured at 25.degree. C on a solution of the polymer in dimethyl formamide containing 1 g of polymer in 100 cm.sup.3 of solution) and a fluorocarbon polymer dispersed in an aqueous medium, drying the coating and thereafter baking it in air at 420 to 450.degree. C.
    Type: Grant
    Filed: May 8, 1978
    Date of Patent: December 26, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventor: Terence E. Attwood
  • Coating compositions comprising a polysulfone and fluorocarbon polymer
    Patent number: RE31448
    Abstract: A coating composition is provided which comprises (a) 10% to 90% by weight of at least one thermoplastic aromatic .[.polysulphones.]. .Iadd.polysulphone .Iaddend.preferably having a reduced viscosity of at least 0.3 (measured at 25.degree. C. on a solution in dimethyl formamide containing 1 g of polymer in 100 cm.sup.3 of solution) and (b) 90% to 10% by weight of at least one fluorocarbon polymer.
    Type: Grant
    Filed: January 29, 1982
    Date of Patent: November 22, 1983
    Assignee: Imperial Chemical Industries, Ltd.
    Inventors: Terence E. Attwood, Barry W. Farrant